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A Report of Armina Babai (Tchang, 1934) (Nudibranchia: Arminoidea: Arminidae) Along Northern East Coast of India

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A Report of Armina Babai (Tchang, 1934) (Nudibranchia: Arminoidea: Arminidae) Along Northern East Coast of India TUDU et al. : A Report of Armina babai (Tchang, 1934)..... Along Northern East Coast of India 273 ISSN 0375-1511 Rec. zool. Surv. India : 115(Part-3) : 273-275, 2015 A REPORT OF ARMINA BABAI (TCHANG, 1934) (NUDIBRANCHIA: ARMINOIDEA: ARMINIDAE) ALONG NORTHERN EAST COAST OF INDIA PRASAD CHANDRA TUDU1, PRASANNA YENNAWAR2, NARAYAN GHORAI3, ANIL MOHAPATRA* 1Marine Aquarium & Regional Centre, Zoological Survey of India, Digha-721428 2Freshwater Biology Regional Centre, Zoological Survey of India, Hyderabad-500048 3Department of Zoology, West Bengal State University, Barasat, West Bengal-700126. *Email: [email protected] ABSTRACT MATERIALS AND METHODS Armina babai (Tchang, 1934) of family Four live specimens (Registration no MARC/ Arminidae is reported with seven specimens ZSI/M4170) are collected by P.C. Tudu on from the Northern part of the east coast of India, 08.01.2014 from the fish bycatch of shore collected from the fish bycatch of Bichitrapur and seine net operated near Bichitrapur mangrove intertidal area Talsari of Balasore District of Odisha (21°35´8.99´´N and 87°25´16.65´´E) and three along with its morphometric measurements. (one live and two dead) specimens (MARC/ZSI/ M4171) collected by P.C. Tudu on 01.03.2015 from INTRODUCTION intertidal area of Talsari mudflat (21°36´4.64´´N Nudibranchs are the bottom-dwelling, jelly- and 87°27´15.50´´E) of Odisha state (Fig. 1). bodied shell-less molluscs with most fascinating shapes and variety of colours forms camouflage the surroundings. There are more than 3,000 known species of nudibranch (National Geographic Animals). The Arminidae is one of the poorly known group of nudibranchs having six nominal genera; approximately 75 species (Ramya et.al. 2014) and Armina is the largest taxon with more than 50 species under Arminidae (Kolb and Wägele, 1998). In Indian water; two species of Armina i.e. A. cygnea (Bergh, 1876) & A. semperi (Bergh, 1861) are reported from Andaman and Nicobar Islands (Ramakrishna et.al.2010) and A. babai (Tchang, 1934) is reported only from Tamil Nadu (Ramya et. al., 2014). Recently during the collection of mollusca samples at Odisha coast seven specimens of Nudibranchs were collected and identified as A. babai which was not yet reported from the region. The present report extends the distributional range of A. babai to Fig. 1. The Collection localities, Talsari mud flat and northern east coast (Odisha). Bichitrapur mangrove of Balasore district of Odisha. 274 Rec. zool. Surv. India Identification and classification follows Kolb and posteriorly and body surface smooth. The notum Wägele (1998), Ramya et. al. (2014) and Bouchet plain without any longitudinal ridges. The oral (2015). Length 12.2-52mm and width 9.5-30mm veil was distinct. Two club-shaped rhinophores in preserved condition and the entire specimen with longitudinal lamellae. Eyes visible through are preserved in 70% ethyl alcohol. the epidermis at the outer base of each rhinophore. RESULTS The caruncle was not distinguishable in front of the rhinophores. The genital opening was located Class GASTROPODA on the right side, anterior to the bronchial lamellae. Order NUDIBRANCHIA Approximately 19 branchial lamellae were counted Superfamily ARMINOIDEA Iredale & Ó on the right side of the body and 16 branchial Donoghue, 1923 (1841) lamellae were counted on the left side. A total Family ARMINIDAE Iredale & Ó of 15 hyponotal lamellae on each side of the Donoghue, 1923 (1841) body. The pedal gland was white and located at Genus Armina Rafinesque, 1814 the posterior end of the foot sole. External body colour of live specimens ash-creamy with dark Armina babai (Tchang, 1934) (Fig. 2) at head portion, anterior margin of the oral veil Diagnosis: Length 12.2-52mm long and 9.5- and the apical portion of the rhinophores white, 30mm wide. The body elongated, flattened, narrow with two large purplish spots on the notum; head covering ashy with dark brown papillae, some papillae below rhinophores, and the anterior gills yellowish white; posterior gills dark Distribution: In India; Tamil Nadu (Ramya et. al., 2014) and present reports extends to northern east coast (Odisha). Elsewhere: China, Japan, Pakistan (Kolb and Wägele 1998; Sachidhanandam et. al., 2000, Ramya et. al., 2014). SUMMARY Seven specimens were examined from collections Odisha state and according to above diagnostic character the species was identified as A. babai (Tchang, 1934). The species was reported previously from Tamil Nadu coast only, hence present reports extends the distribution of A. babai (Tchang, 1934) to Northern east coast (Odisha coast). ACKNOWLEDGEMENT Our sincere thanks to Director, Zoological Fig. 2. A-B. Armira babai (Tchang, 1934) in the intertidal Survey of India for providing necessary facilities area during low tide, A-live specimen and B-dead specimen at Talsari for this work. REFERENCES Bouchet, P. 2015. Armina babai (Tchang, 1934). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=558911 on 2015-04-17. TUDU et al. : A Report of Armina babai (Tchang, 1934)..... Along Northern East Coast of India 275 Kolb, A. and Wägele, H.1998. On the phylogeny of the Arminidae (Gastropoda, Opisthobranchia, Nudibranchia) with considerations of biogeography, J. Zool. Syst. Evol. Research 36: 53-64 National Geographic Animals (Nudibranch) accessed on 06.05.2015 http://animals.nationalgeographic. com/animals/invertebrates/nudibranch/ Ramakrishna., Sreeraj, C.R., Raghunathan, C., Sivaperuman, C., Yogesh Kumar, J.S., Raghuraman, R., Immanuel, T. And Rajan, P.T. 2010. Guide to Opisthobranchs of Andaman and Nicobar Islands: 1-198. (Zoological Survey of India) Ramya, M.S., S. Ravichandran, and R. Anbuchezhian. 2014. First discovery of Armina babai (Gastropoda, Nudibranchia, Arminoidea) from southeast coast of India, Journal of Asia-Pacific Biodiversity 7: 364-366. Sachidhanandam, U., Willan, R.C. and Chou, L.M. 2000. Checklist of the nudibranchs (Opisthobranchia: Nudibranchia) of the South China Sea, The Raffles Bulletin of Zoology, Supplement No. 8: 213- 537. Manuscript Received : 8th July, 2015; Accepted : 8th December, 2015..
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